Feeding behavior of cabbage worms 5, feeding behavior of cabbage worms

Problem: Brassicaceae always feed on cruciferous plants. Is this behavior congenital?

Make a hypothesis: cabbage insects always feed on cruciferous plants, and this behavior is congenital.

Make a plan: Go to the cruciferous plant and look for leaves with cabbage eggs. You can go to the vegetable patch that has not been pesticide-applied, or you can look for it in the vegetable market. After finding it, the eggs should be kept in isolation. After the eggs hatch larvae, the experiment can be done.

Prepare the leaves of several cruciferous plants, squeeze part of the sap and apply the sap to a small piece of filter paper. Use filter paper without vegetable juice as a control. Other kinds of plant leaves can also be used as a control, such as celery leaves, spinach leaves, lettuce leaves, etc.

Look at the cabbage worms are more inclined to go to the ** to eat.

Discuss and refine the plan:

Only by isolating and rearing from the eggs can it be said that observing or testing some of the behaviors of cabbage insects is instinctive or acquired, so that ** has credibility.

It is not difficult to isolate eggs when raising cabbage worms under artificial conditions. But it is still a little difficult to raise it to survive. First of all, it is necessary to create a breeding environment close to the natural living environment for cabbage insects as much as possible, such as appropriate light, temperature, humidity, sufficient and fresh food, etc.

Secondly, the number of breeding should not be too small, otherwise it is difficult to explain the problem.

You can choose plant leaves with special volatile oils, such as mint leaves, celery leaves, etc. See if the cabbage worm likes it. It is best not to have hairs or thorns on the leaves to avoid the interference of other factors.

The blades used for the experiment should be the same size as the filter paper, and the purpose of this is also to reduce the interference of other factors.

The color of the filter paper should be the same as that of the vegetable leaves, which is also to avoid the interference of other factors.

It is best to starve the cabbage worm for a period of time, and do this when the cabbage worm has a higher appetite**. You can place the filter paper and the vegetable leaves on the same horizontal line, so that the cabbage worms are at the same distance from the filter paper and the vegetable leaves (not too far away). Let go of the cabbage worm and see what it eats.

Control experiments and experiments should be done at the same time and place, so as to ensure the rigor and effectiveness of the best.

Implementation plan: Conduct experiments according to the determined ** plan, carefully observe and make records.

The results of the analysis led to the conclusion that the cabbage worm always feeds on cruciferous plants, and this behavior is congenital.

The feeding behavior of cabbage worms is a congenital behavior!

(1) Ask the question: Is it a congenital behavior that cabbage insects always appear on the leaves of cruciferous plants (cabbage, cabbage, bok choy, rape, radish, etc.) and do not eat the leaves of other plants (such as celery leaves, mint leaves, etc.)? Make assumptions:

Based on the question asked, apply your existing knowledge and life experience to make assumptions about the answer to the question: the act of eating cruciferous plants is congenital (answering the question in the affirmative or negative).

3) The advantage of isolating from the eggs is that it is possible to observe or test some of the behaviors of the cabbage worm whether it is instinctive or learned, so that the ** has credibility

The experimental variable of this experiment was the leaves of the cruciferous plant, and the leaves of two plants were selected, one was the leaf of the cruciferous plant; The other is the leaves of non-cruciferous plants, such as the leaves of plants such as celery

**Experiments generally can not only select one experimental object, otherwise the results have a great chance and are not enough to illustrate the problem, and the appropriate selection of a certain amount of materials can reduce the error

4) Draw conclusions: Verify the validity of the hypothesis The behavior of cabbage worms feeding on cruciferous plants is a congenital behavior

Therefore, the answer is: (1) Is it a congenital behavior for cabbage worms to always feed on cruciferous plants?

2) isolated rearing from the eggs; Avoid cabbage worms from acquiring learning behaviors and make ** credible;

3）b；Errors can be reduced;

4) The behavior of cabbage worms feeding on cruciferous plants is a congenital behavior

The purpose of isolating and rearing from eggs: It is possible to explain whether some behaviors of cabbage worms are congenital behaviors (instincts) or acquired behaviors, so that ** can be credible

A controlled experiment refers to an experiment in which the conditions are the same except for the different conditions when studying the influence of a condition on the research object The experimental variable is the experimental variable that is processed is the experimental group The one who is not treated is the control group The variable of the experiment is the cruciferous plant, so the leaves of the experimental group are the leaves of the cruciferous plant, and the leaves of the control group are the leaves of celery

Therefore, the answer is: It is a congenital behavior that cabbage insects always feed on cruciferous plants;

congenital behavior;

leaves of cruciferous plants; celery leaves;

It is congenital for cabbage insects to always feed on cruciferous plants.

(2) Making a hypothesis is an affirmative or negative answer to the question posed Therefore, the hypothesis is that it is a congenital behavior for cabbage worms to feed on cruciferous plants, or that it is not a congenital behavior for cabbage worms to feed on cruciferous plants

The eggs of the cabbage worm are isolated and hatched, which reduces the influence of external factors and ensures that the behavior of the cabbage worm is congenital

**Only one variable can exist in the experimental group and the control group of the experiment, and all other conditions should be exactly the same So the answer is:

2) Cruciferous eating of cruciferous plants is a congenital behavior (Cruciferous eating of cruciferous plants is not a congenital behavior).

Ensure that the behavior of cabbage worms is congenital.

Equal; Armor; Second.

According to the fact that cabbage worms always feed on cruciferous plants, the question is asked: Is this behavior congenital? A positive or negative answer to the question posed can be assumed that it is congenital for the cabbage worm to always feed on cruciferous plants

Look for leaves with cabbage eggs

The purpose of isolating and rearing from eggs: It is possible to observe or test whether some behaviors of cabbage insects are instinctive or learned, so that ** has credibility

A controlled experiment refers to an experiment in which the conditions are the same except for the different conditions in which the experimental variable is treated, and the experimental group is not treated, so A is the experimental group and B is the control group

Conclusion: Answering in the affirmative or negative to the hypothesis, according to the experimental results that cabbage worms feed more cruciferous plants, it is concluded that cabbage worms always feed on cruciferous plants is a congenital behavior

Therefore, the answer is: It is a congenital behavior that cabbage insects always feed on cruciferous plants; congenital behavior; Armor; It is congenital for cabbage insects to always feed on cruciferous plants.

1) Adults 2) Cruciferous plants are congenital in their behavior Congenitally formed celery in group A leaf group B leaf group The behavior of cabbage insects in always feeding on cruciferous plants is a congenital behavior.

Investigation Report: Feeding behavior of cabbage worms.

Survey subject: cabbage worm.

Objective: To study the dietary preferences of cabbage worms. (You can change the expression of this according to the survey method).

Survey methods: 1) Preparation: cabbage eggs a. Leaves of several cruciferous plants (large and small bok choy, etc.) b. Squeeze the sap of some cruciferous plants and apply the sap to a small piece of filter paper c. Filter paper without anything d. Plants that are not cruciferous (celery, spinach, etc.) ABCD as control.

2) Experiment: Put cabbage eggs on ABCD (eggs should be put more, use things to separate ABCD The environment should be the same to avoid the interference of other factors).

After the vegetables are raised, the lead green worms hatch to see which ABCDs have been eaten.

3) Explanation: The reason for releasing eggs is that if you use bugs, you may have the interference of learning the right behavior. Releasing more eggs is to ensure that the cracks can hatch to avoid some not hatching, and there is also the need not to starve the insects, otherwise there may be hunger interference

Findings: (BCD is not eaten) Brassica insects like to eat cruciferous plants.

Alas. I'm in a hurry, it's better for you to compare me ppt